Device for placing a paper bag bottom

ABSTRACT

A device for placing a paper bag bottom produces score lines on the ends of tubular segments which are used for producing bags, applies glue layers to the folded bottoms on the extremities of the tubular segments and/or to sheets for gluing them with the bottoms with the aid of gluers and connects and glues the folded bottoms and the sheets. The device has at least one gluer which includes at least one glue reservoir or at least one glue duct, the glue contained in the reservoir or in the duct being exposed to a pressure higher than ambient pressure. The glue reservoir or the glue duct is provided with at least one output orifice for applying the glue to the sheets and/or to the folded bottoms.

This is a nationalization of PCT/EP03/009663 filed Aug. 29, 2003 andpublished in German.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention concerns a device for placing a paper bag bottom that hasconnected and glued folded bottoms.

2. Description of the Prior Art

Devices of this kind are used for manufacturing different types of bags.These include cement bags that are usually manufactured as valve bags.For this purpose usually the bottom folding involves the use of valvesheets that are inserted in the bottom of the bag. However it isimportant to differentiate between pinch-, block- and cross bottoms. Inthe creation of cross bottom bags that is explained, for instance, in DE090 145 48 U1 and DE 3020043 A1, special demands were placed on thegluing.

In all devices of this kind the bag bottoms are formed with the help ofglue—usually starch glue. For this purpose either the folded bottoms orthe valve sheets assigned to them or both the aforementioned elements tobe glued are provided with a glue layer and subsequently mergedtogether. Each of the bag components is glued usually by bringing aformat part in contact with glue rollers or other glue storage ortransmission components. The format part is attached to a rotatingroller and is often also referred to as a plate. By rotating the glueroller, the format part is supplied with glue. As the glue rollercontinues to rotate, the format plate transfers the glue stored on it tothe respective bag component to be glued.

For this purpose the format part is provided with characteristic peaks(ridges) that are adapted to a definite bag format. In order tomanufacture bags with different measurements on the bottoming device theformat parts are replaced.

The described type of glue application has stood the test of time in thedevices for placing a paper bag bottom because it enables a cleanapplication of large quantities of starch glue that is otherwisedifficult to handle.

However, this method of glue transfer makes it necessary to makeavailable and later clean many mechanical glue transfer components—suchas for instance the plate roller and the format parts.

Therefore the task underlying the present invention is to make thesecomponents redundant.

SUMMARY OF THE INVENTION

The task is solved by the fact that

-   -   at least one gluer    -   that is equipped with at least one glue reservoir or at least        one glue duct in which the glue is exposed to a pressure that is        higher than the ambient pressure    -   and whereby the at least one glue reservoir (21) or the at least        one glue duct is provided with at least one glue output orifice        through which the glue is directly applied on the sheets and/or        the folded bottoms (1).

An advantageous design form of the present invention can carry out aglue transfer process on the components to be glued while at the sametime preventing a component of the bottoming device that is carrying theglue, such as the glue reservoir or the glue duct, from touching the bagcomponents. For this purpose the output orifices should be appropriatelydistanced from the parts to be glued. The glue can be properly sprayedagainst the parts to be glued. This contact-free glue application canprevent the contours of the format from being smeared and thus distortedby the contact.

However, the contours can be intentionally smeared by the components ofthe gluer. Particularly, if the glue application occurs not across theentire surface but instead for instance in the form of glue lines, theentire surface can be covered with glue by smearing the glue lines. Thissmearing is possible by a direct contact between the glue reservoir orthe glue duct and the glue lines. However, as a rule, additional rollerscontribute to a smearing or compression of the glue lines.

Another advantageous design form of the present invention featuresnumerous output orifices that are provided at a glue application head.

Further examples of implementation of the present invention emanate fromthe graphic description and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The individual figures illustrate:

FIG. 1A glue application device for bag bottom sheets in accordance withthe prior art.

FIG. 2 A glue application device for cross bottoms in accordance withthe prior art.

FIG. 3 View of a gluer in accordance with the present invention

FIG. 4 View of a gluer in accordance with the present invention thatproduces complex adhesive formats.

FIG. 5 a) A side-view of an example of implementation of the presentinvention with a glue duct for the glue supply of the valve

FIG. 5 b) A top-view of the example of implementation of the presentinvention illustrated in FIG. 5 a)

FIG. 5 c) Another side-view of the example of implementation of thepresent invention illustrated in FIG. 5 a)

FIG. 6 A view of an application head with several rows of valves

FIG. 7 a) A view of the side of an application head. The sideillustrated is facing the parts to be glued.

FIG. 7 b) An illustration of the glue duct from the valves to the outputorifices in the example of the implementation of the application headillustrated in FIG. 7 a).

FIG. 7 c) An enlarged section from FIG. 7 b)

FIG. 8 a) A top-view of an application head that can move in they-direction

FIG. 8 b) A top-view of an application head that can move in they-direction

FIG. 8 c) A top-view of an application head that can move in they-direction

FIG. 9 a) A sheet 2 with a U-shaped adhesive format

FIG. 9 b) A sheet 2 with an adhesive format in the shape of arectangular frame.

Furthermore, the individual figures illustrate:

FIG. 10 Another side-view of a nozzle applicator

FIG. 11 Another top-view of a nozzle applicator

FIG. 12 Another section through a format plate system in accordance withthe present invention (section A-A in FIG. 4)

FIG. 13 Another top-view of a pin plate that is mounted on a base plate.

The following figures illustrate not only glue application devices forcross bottom bags but also devices of prior art. The illustrated devicesin accordance with the invention apply glue solely on bottom sheets 2.However they can also apply glue equally well on cross bottoms 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Further scope of applicability of the present invention will becomeapparent from the detailed description given hereinafter. However, itshould be understood that he detailed description and specific examples,while indicating preferred embodiments of the invention, are given byway of illustration only, since various changes and modifications withinthe spirit and scope of the invention will become apparent to thoseskilled in the art from this detailed description.

FIG. 1 illustrates a glue application device as is usually used inaccordance with prior art for gluing bottom sheets 2. In this deviceglue is transferred from a glue cylinder 11 on the format part or plate12. The format part or plate 12 is carried by a plate cylinder 13 andaround the axis of the plate cylinder 13 in the direction marked by thearrow 16. In this movement of rotation the format part or plate 12transfers glue on the bottom sheets 2 that are carried by the grippercylinder 14 during the glue transfer. The bottom sheets 2 are carriedbeforehand by a transport device (not illustrated in the figure) alongthe dotted line 18 in the direction of the arrow x into the splitbetween cylinders 13 and 14. The rotation of the gripper cylinder 14 inthe direction marked by the arrow 15 carries the glued sheets further tothe bag bottoms 1. The bag bottoms 1 are transported by a transportdevice (also not illustrated in the figure) in the direction of thearrow w. The bags 19 are closed by the bag bottoms 1.

Between the gripper cylinder 14 and the transport device of the bags, apressure is built up that compresses sheets 2 and bag bottoms with eachother, thus joining them permanently.

FIG. 2 illustrates another glue application device 20 in accordance withprior art that is usually used for gluing the bag bottoms 1. For thispurpose, a plate or format part 22 that is attached to the circumferenceof the plate cylinder 23 is brought into contact with the glue transfercylinders 28 by the rotation of the plate cylinder 23 around its axis 25in the direction of the arrow 27 and thus supplied with glue. For thispurpose the format part 22, similar to the format part 12, has recesses(not illustrated in the figure). These recesses are filled with gluewhen they contact the glue transfer rollers.

The glue transfer rollers 28 border the opening of a glue reservoir 21.During their rotation the glue transfer rollers transport glue on theircircumference from glue reservoir 21 to the plate 22.

In the further course of the rotation of the cylinder 23, the formatpart or plate 22 enters into the roller clearance 24 between thecylinders 29 and 23. There the plate 22 transfers glue on a bag bottom1. The bag is transported beforehand by a conveying device along thedotted line 26 into the roller clearance.

In case the bag formats are altered, the format parts 12, 22 arereplaced by format parts that conform to the new bag format.

FIG. 3 illustrates a sketch of a sheet gluer 30 of a cross bottomingdevice in accordance with the invention. It provides individual sheets 2carried in the direction of the arrow x with glue lines 3. For thispurpose the gluer 30 is equipped with an application head 31. Thisapplication head is provided with glue with the help of the tube 33. Theglue is distributed inside the application head 31 by appropriate glueducts onto the valves 32. The valves 32 are attached to the applicationhead 31 in two rows that run transverse to the conveying direction x ofthe sheets 2. These valves 32 are at least in the position to release orcut off the glue flow. They can be controlled by external,preferentially electric, signals and they 32 withstand the gluepressure.

On the under surface (not illustrated in FIG. 3) of the application head31 are the output orifices 71 through which the glue leaves theapplication head 31 and forms the glue lines 3. The arrow x points tothe transfer direction of the sheets 2, while the arrow y points to thehorizontal direction running transverse to it.

FIG. 4 illustrates a gluer 40 that is constructed externally exactlylike the gluer 30 from FIG. 3. The various glue lines 44 to 47 show thatthe most different adhesive formats are realizable using such a device,without having to employ format parts. In this connection a variation ofthe plate breadth, i.e., the expansion of the adhesive surface in ydirection is feasible by a switch-off or switch-on of valves 42 duringthe production of bags in this adhesive format. The valves that areswitched off in this way are not active during the complete duration ofthe glue application of sheets 2, 48 or bag bottoms of one format. Inthis manner preferentially rectangular adhesive formats emerge—asillustrated in FIG. 3. These are formed out of the end-to-end glue lines3, 47 that usually have the same length.

For this purpose the valves that are active white creating an adhesiveformat must be closed after creating an end-to-end glue track 47. Thevalves should be reopened when the next still unglued sheet 48 arrivesat the output orifices. In case of customary glue application speeds,this work sequence leads to considerable demands on the switching timeof the valves 32. If further variations in the form of the adhesiveformat or adhesive quantity are carried out, the valves 42 must beopened and dosed faster than the creation of end-to-end glue lines 47.

Thus an essential variation of the applied adhesive quantity is possibleparticularly by applying several noncontinuous glue lines 44. Thefurther variation of the form of the adhesive format, involving a cleardeviation from the rectangular shape, requires the application of short45 and noncontinuous glue lines 46. For example it is often necessarythat the adhesive formats 4 have a U-shape 4 a) or a rectangular frame 4b) as is illustrated in FIGS. 9 a) and b). For this purpose a differentcontrol of the valves is necessary while gluing a bag component that isto be glued 1, 2.

It is advantageous if the valves provided in the bottoming device have aswitching time and/or are switched in a time period less than 5milliseconds. Then a large part of the variations of adhesive formatsthat are required in the industry and can be carried out by changingindividual glue line lengths in the x direction, can be implemented inthe manner described above using current gluing speeds.

With the help of the various glue lines 45 to 48 it is possible to sensehow flexibly such a device in accordance with the present invention cangenerate formats if the valves are switched even faster.

The design forms illustrated in the FIGS. 3 and 4 are as suitable forthe actually illustrated gluing of individual sheets 2 as they are forgluing paper webs that can be separated later. Also in case of the bagbottoms 1 the glue application can be carried out analogously.

The FIGS. 5 a), b) and c) illustrate a preferential design form of theglue duct inside a design form of an application head 50 to the valves32. Also, the glue output borehole 71 and the glue duct from the valves32 to the glue output lines 71 are not illustrated here considering theclarity of FIGS. 5 a) to c).

The glue duct results from two transverse channels 52 and 53 that areillustrated with dotted lines in the FIGS. 5 a) and 5 b). These channelsrun in the application head 50 essentially transverse to the conveyingdirection x of the sheets 2 or bag bottoms 1. FIG. 5 c) illustrates thatthese two glue channels 52, 53 in the illustrated design form areboreholes for production reasons. However, the channels can have anothershape just as well.

Glue channels 55 rise from the glue channels 52, 53 in verticaldirection z to each valve. The glue arrives through these glue channels55 directly to the valve 32.

Both the glue channels 52 and 53 can be advantageously connected to thefront end of the head opposite to the glue ducts. The connection takesplace by means of another glue channel that runs in the application head50 in x direction. In this way the glue can flow e.g., via the gluechannel 52 provided for this purpose with a feed line, and flow throughthe connection channel and through the glue channel 53 in order to drainfinally through a glue discharge. In this manner a glue circulationthrough such an application head is possible.

These additional characteristics are however not illustrated in theFIGS. 5 a) to c).

The FIGS. 6 and 7 highlight once again the relation between the numberof valves 32 and the glue output orifices 71.

This relation influences decisively the possibilities of adjusting theadhesive format breadth. Adhesive format breadth implies again theexpansion of the adhesive format 4 in y direction. If only a limitednumber of valves is provided to which a large number of glue outputorifices is assigned in each case, the desired format breadth isachieved roughly, i.e., with very low resolution. However tests showthat at least one satisfactory portion of customary formats can beproduced advantageously with a quorum of five valves that can becontrolled independent of each other.

In the application head 60 illustrated in FIG. 6 several rows of valvesVRi to n are arranged one after another successively in the transferdirection x of the bag components that are to be glued. In order toillustrate the allocation of the valves to the valve rows, the referencenumbers of the valves 32 and the glue channels assigned to them 72, 73are indexed with the numbers of the respective valve row i-n.

It is advantageous to arrange the valves 32 in y direction one afteranother because the valves 32 that come into question for such a glueapplication device have a considerable overall breadth B. This overallbreadth B often exceeds the desired distance between the glue lines inthe direction transverse to the transport of the bag components.Generally it is advantageous to assign several glue output orifices toeach valve as illustrated in FIG. 7 b). However in such a design form ofthe present invention, the closure of a valve leads to the interruptionof several glue lines so that finally a lower resolution must beconsidered in case of the free structuring of the breadth of theadhesive format 4. In case of an arrangement of a very large number ofvalves 32 on one application head 61, it is possible to arrange the gluelines in the y direction close to one another and at the same time toachieve a very high resolution in the formation of the adhesive profile.It is also possible for this purpose to offset the valve rows in ydirection against each other. Also in case of an application head withseveral valve rows VRi to VRn it is possible to ensure that the glueoutput orifices lie in one line as illustrated in FIG. 7 a). This can beachieved by directing the vertical glue output channels 72, 73 in xdirection.

The afore-mentioned FIG. 7 a) illustrates the side 76 of an applicationhead 70 that is facing the bag components 1,2. The application head 70consists essentially of a valve mounting plate 75 on which the valves 32are located. As mentioned already the glue output orifices lie in oneline that runs orthogonally here to the conveying direction x of thesheet 2. Thus in the illustrated design form of the invention theboreholes 71 in x direction lie at the same level.

To position the output orifices 71 in x direction differently,differences in the run-time must be taken into account while controllingthe valves. These differences in the run-time occur because the same bagcomponent 1, 2 passes the glue outlets that are unequally arranged in xdirection at different points of time. These run-time differences arespeed-dependent and thus difficult to be taken into account. Thereforethe arrangement illustrated in FIG. 7 a) is markedly advantageous.

FIG. 7 b) illustrates how glue arrives from the valves 32 to the glueoutput orifices 71. In the view illustrated in FIG. 7 b) only the valves32 i in the first valve row VRi can be seen. In the design formillustrated in FIG. 7 b), however, three valve rows are provided ofwhich the two back rows are not illustrated. However, in this designform four glue output orifices 71 are assigned to each valve 32 i to 32iii. The braces 77 i to 77 iii mark three adjoining groups of glueoutput orifices 71 whereby each group is assigned at a time to a valveout of each of the three valve rows VRi to VRiii. In the y direction theopenings of the valves lie centrally, thus in the center of their valvebreadth B. These valve openings are aligned with the upper glue outletchannel 72. In order to enable this type of arrangement the valve rowsVRi to VRiii are each offset against each other by the distance C in they direction. In the illustrated arrangement the distance A between theglue output orifices 71 is much smaller than the valve breadth B. Thus,initially very fine glue lines 3 with small interspacing can be createdthat can be turned into a flat application easily through smearing orcompressing.

In the present design form of the invention the distance C defines theresolution already discussed above between adjoining two upper glueoutlet channels 72 in y direction when the format breadth is adjusted byswitching the valves on or off selectively. Similarly the distance Calso defines the resolution when the shape of the adhesive format isadjusted, that is the desired deviation from the rectangular shape ofthe format 4 illustrated in FIG. 3 that has already been discussed withreference to FIGS. 4 and 9 a) b).

In this context FIG. 7 b) also illustrates the importance of the measureD that results from the addition of the distances A between the glueoutput orifices 71, that are fed with glue from a valve.

In the example of implementation illustrated in the FIG. 7 b), owing tothe described arrangement of different valve rows VRn behind oneanother, it is possible, that the dimension D is also clearly smallerthan the valve breadth B (here D<B/3). This factor is markedlyadvantageous because the consequently larger resolution in the case of avariation in format breadth and shape allows a more exact reduction ofthese measurements to what is actually necessary. Thus glue is saved.This is possible in case of sufficient resolution also without changingformat parts 12, 22.

FIGS. 8 a) to 8 c) illustrate in top-views of an example ofimplementation the mobility of an application head 80 in y directionrelative to the sheets 2. This design form of the invention opens upfurther variation possibilities in the areas of resolution and formatbreadth and thus further increases the flexibility when the adhesiveprofile 4 is formed freely, without making an exchange of format partsnecessary.

The mobility is clearly on the basis of the position of the center lineso and p drawn in the illustration. The center lines o and p run throughthe center of the application head 80 and the sheet 2. In FIG. 8 a) boththese lines are in alignment. In both of the other figures a relativedisplacement of the application head 80 has taken place opposite to thesheet 2. An extensive illustration of a displacement mechanism isomitted here.

As already mentioned the FIGS. 9 a) and b) illustrate a U-shaped 4 a)and a rectangular glue format 4 b) on two sheets 2. The U-shaped glueformat consists of end-to-end 3 and short glue lines 45. The glue formatin the shape of a rectangular frame 4 b) is made up of end-to-end 3 andnoncontinuous glue lines 46. The different flow pattern of the gluelines is possible by controlling the glue valves 32 selectively duringthe gluing of a bag component 1, 2 that is to be glued.

In the figures no pumps or pressure tanks are illustrated that areusually required in order to convey the glue and build up or maintainthe glue pressure required for the extrusion. All examples ofimplementation of the present invention illustrated and also describedby the claims below also apply to an indirect gluing of bag components1, 2 whereby the glue is first transferred on a roller or another formbefore it arrives on the bag components.

FIG. 10 illustrates another side-view of a nozzle applicator 114 as usede.g., in a bag machine. The nozzle 103 of the nozzle applicator isprovided with a liquid glue via the glue supply 101 that meets the glueinflow 111. The nozzle applicator receives power and control signals viathe control line 102 and the connector 112.

FIG. 11 illustrates another top-view of the same device.

FIG. 12 illustrates another section A-A through the format plate system119. The format plate system 119 consists in this example ofimplementation of the base plate 104, the sandwich plate 105 and the pinplate 106. By opening the valve 103 the pressurized glue is compressedby the inlet 116. The complete channel system 115 defined by the pinplate is illustrated in FIG. 13. A channel system can also be a systemwith several channels 115. The main purpose of such a channel system isthe distribution of the glue onto several output orifices. That is allthe more important since the gap between the output orifices is usuallysmaller than the breadth of the valves. Also the costs of the valves arehigh and justify the use of such a channel system. Therefore it is alsopossible to provide several channels with glue from one valve. Thechannels can then distribute the glue on several output orifices. In theexample of implementation illustrated, the adhesive and/or glue arrivesfrom the channels 115 into the output orifices 113. Subsequently theadhesive leaves the output orifices 113 and is applied on paper or foilmaterial 107 and forms adhesive tracks 108 there since the material 107is moved past the format plate system 119 in the direction of the arrow121. In the illustrated example of implementation the output orifices113 are sealable by pins 120. These pins are fastened rotatably in thepin plate 106 and are fixed by the safety device 118 in axial direction.The pins 120 pierce through the output orifices 113. On the level of theoutput orifice 113 the pins contain a glue outlet orifice 117. In anappropriate adjustment this borehole allows glue to pass through so thatadhesive is applied on the material 107. In FIG. 12 the adhesiveapplication has just been completed. For this purpose the pin 120 wasturned by 90° just like a screw with the help of a groove (notillustrated in the figure) in the pinhead 110, so that the axis of theglue admission orifice 117 projects out of the drawing plane and one canlook into this opening 117.

FIG. 13 illustrates a top-view of a pin plate 104 that is removed fromthe remaining format plate system 119. The observer looks in thedirection of the glue flow on this plate. The channels 115 and theoutput orifices can be recognized clearly.

The invention being thus described, it will be apparent that the samemay be varied in many ways. Such variations are not to be regarded as adeparture from the spirit and scope of the invention, and all suchmodifications as would be recognized by one skilled in the art areintended to be included within the scope of the following claims.

List of reference symbols x Conveying direction of the sheets yDirection in space transverse to the conveying direction of the sheets(horizontal) z Direction in space transverse to the conveying directionof the sheets (vertical) w Conveying direction of the bag bottoms 1  1Bag bottom  2 Sheet  3 Glue line  4 Rectangular adhesive format    4 a)U-shaped adhesive format    4 b) Adhesive format in the shape of arectangular frame 10 Known gluer, preferentially for sheets 11 Gluecylinder 12 Plate and/or format part 13 Plate cylinder 14 Grippercylinder 15 Arrow in the rotating direction of the gripper cylinder 1416 Arrow in the rotating direction of the plate cylinder 13 17 Arrow inthe rotating direction of the glue cylinder 17 18 Dotted line 19 Bag 20Known gluer, preferentially for cross bottoms 21 Glue reservoir 22 Plateand/or format part 23 Plate cylinder 24 Roller clearance 25 Axes of thecylinders 26 Dotted line that sketches the route of transport of thebags 27 Rotating direction of the cylinders 28 Glue transfer cylinder 29Impression cylinder 30 Glue application in accordance with the invention31 Application head and/or application plate 32 Valves   32n Valve ofthe nth. valve row 33 Glue feed line/tube 40 Gluer in accordance withthe invention 41 Application head and/or application plate 42 Valves 43Glue feed line/tube 44 Glue lines discontinued at regular distances 45Short glue line 46 Noncontinuous glue line 47 End-to-end glue line 48Non-glued sheet 50 Application head 52 Glue channel in y direction(horizontal) on the application head 53 Glue channel in y direction(horizontal) on the application head 55 Glue channel in z direction(vertical) on the application head 56 Mounting plate 60 Application headwith n valve rows 61 Valve mounting plate VRi First valve row VRiiSecond valve row VRn nth valve row 66 The side of the valve mountingplate facing away from the bag components to be glued. 70 Applicationhead 71 Glue output orifice 72 Upper glue output channel 73 Lower glueoutput channel 75 Valve mounting plate 76 The side of the valve mountingplate facing the bag components to be glued  77i First group of glueoutput orifices   77ii Second row of glue output orifices    77iii Thirdrow of glue output orifices A Distance between two glue output orifices71 in y direction B Breadth of the valve 32 in y direction C Distancebetween two adjoining upper glue output orifices in y direction D Sum ofthe distances between the glue output orifices 71 that are provided withglue from a valve. 80 Example of implementation of an application head oCenter line of the application head 80 p Center line of the sheet 2 ySpace direction transverse to the conveying direction of the bagcomponents 101  Glue supply 102  (electric) control line 103 Electromagnetic valve 104  Base plate 105  Sandwich plate 106  Pin plate107  Paper/foil 108  Adhesive/glue (starch basis or dispersion) 109 110  Pinhead 111  Glue inflow 112  Connector 113  Output orifice 114 Sealing 115  Channel 116  Inflow 117  Glue supply borehole 118  Pinsafety device (retainer) 119  Format plate system 120  Pin 121  Arrow inthe direction of the material (107) handling

1. A bottoming device for forming a cross bottom paper bag, the deviceconfigured to form the cross bottom of the paper bag by providing foldsat extremities of a tubular segment from which the bag is produced suchthat lines of a glue are applied to at least one of a folded bottom onthe extremities of the tubular segment and a sheet to be glued with thebottom, and to connect and glue the folded bottom and the sheet, thebottoming device comprising a gluer having an application head with aglue duct in which the glue is exposed to a pressure that is higher thanambient pressure such that the glue is transported throughout theapplication head, the application head including a plurality of valveseach having at least one glue output orifice through which the glue isdirectly applied to the at least one of the folded bottom and the sheet,the valves being arranged in a configuration that includes at least afirst valve row (VRi) and a second valve row (VRii) with each of thefirst and second valve rows extending along a length of the applicationhead in a direction (y) that is transverse to a bag transfer direction(x), and a glue circulation channel that provides for circulation of theglue within the application head, the glue circulation channel including(i) a first transverse channel and a second transverse channel eachextending along the length of the application head in the (y) direction,and (ii) a connection channel extending across the application head inthe (x) direction, the connection channel connecting an end of the firsttransverse channel to an adjacent end of the second transverse channel,the glue circulation channel providing for glue flow through the firsttransverse channel, across the connection channel, and through thesecond transverse channel to drain from the application head.
 2. Thebottoming device in accordance with claim 1 wherein the glue applicationis performed between the glue output orifice and the at least one of thesheet and the folded bottom in a contact-free manner.
 3. The bottomingdevice in accordance with claim 1 wherein the valve configurationincludes a plurality of valve rows (VRi, VRn).
 4. The bottoming devicein accordance with claim 3 wherein each of the plurality of valve rowsincludes a plurality of valves.
 5. The bottoming device in accordancewith claim 4 wherein each of the valve rows is offset laterally in the(y) direction from an adjacent valve row.
 6. The bottoming device inaccordance with claim 1 wherein each of the first and second valve rowsincludes a plurality of valves.
 7. The bottoming device in accordancewith claim 1 wherein each of the valves includes a plurality of glueoutput orifices.
 8. The bottoming device in accordance with claim 7wherein the application head has a plate-like form whereby the glueoutput orifices are provided on a side of the application head facingthe bag that is being formed.
 9. The bottoming device in accordance withclaim 7 wherein a distance (A) between adjacent orifices along the (y)direction is less than a breadth (B) of each of the valves.
 10. Thebottoming device in accordance with claim 9 wherein a sum (D) of thedistances (A) between the glue output orifices in each of the valves isless than the breadth (B) of the valve.
 11. The bottoming device inaccordance with claim 7 wherein the glue output orifices are located inone line extending along the length of the application head in the (y)direction.
 12. The bottoming device in accordance with claim 7 whereinthe valves are supplied with the glue by at least one borehole orchamber in the application head.
 13. The bottoming device in accordancewith claim 12 wherein the borehole or chamber extends substantiallytransverse to the bag transfer direction (x).
 14. The bottoming devicein accordance with claim 7 wherein a distance between the outputorifices can be selected during the application of the glue.
 15. Thebottoming device in accordance with claim 1 wherein the valves areprovided on a side of the application head facing away from the bag thatis being formed.
 16. The bottoming device in accordance with claim 1wherein the application head is moveable in the (y) direction transverseto the bag transfer direction (x).
 17. The bottoming device inaccordance with claim 1 wherein the application head is rotatable from aglue application position.
 18. The bottoming device in accordance withclaim 17 wherein the rotatable application head is positionable invarious stationary positions each dedicated to a specific function. 19.The bottoming device in accordance with claim 18 wherein at least two ofthe stationary positions are dedicated to at least two functionsincluding applying the glue to form the bag, sealing the glue outputorifices, removing any glue contaminating the application head, andrinsing the application head.
 20. The bottoming device in accordancewith claim 1 wherein the glue duct has a water connection.
 21. Thebottoming device in accordance with claim 20 wherein the waterconnection has a check valve.
 22. The bottoming device in accordancewith claim 1 wherein the glue duct includes at least one of a pressurerelief valve, a pressure sensor, and a pressure controller.
 23. Thebottoming device in accordance with claim 1 wherein the application headincludes a projection on a side facing the bag that is being formed, andthe projection is closer to the bag than is the output orifice duringthe glue application.
 24. The bottoming device in accordance with claim1 wherein the application head includes flexible lines that provide atleast one of the glue and water to the head.
 25. The bottoming device inaccordance with claim 1 wherein each of the valves is controllableindependently of the other valves such that the glue application fromthe respective glue output orifice can be selectively started andstopped.
 26. The bottoming device in accordance with claim 25 whereinthe valve is controllable to open and close during the glue application.27. The bottoming device in accordance with claim 1 wherein theapplication head includes at least five valves.
 28. The bottoming devicein accordance with claim 1 wherein the glue duct has a cross-sectionalarea that is at least half as large as a sum of cross-sectional areas ofthe glue output orifices.
 29. The bottoming device in accordance withclaim 1 further comprising a metallic cylinder hard counter bearing onwhich at least one of the folded bottom and the sheet are located duringthe glue application.
 30. The bottoming device in accordance with claim1 wherein the application head includes at least one stopper located ina transport path of the glue to the valves with which at least one ofthe glue duct and the glue output orifices can be sealed.
 31. Thebottoming device in accordance with claim 30 wherein the stopperincludes a pin.
 32. The bottoming device in accordance with claim 31wherein the pin is rotatably held in a format plate having a glue outletsuch that rotation of the pin seals at least one of the duct and theglue output orifices.
 33. The bottoming device in accordance with claim31 wherein the pin is inserted in at least a part of the glue outputorifice such that a main axis of inertia of the pin coincides with anaxis of the glue output orifice.
 34. The bottoming device in accordancewith claim 1 wherein for a specific gluing format at least one of thevalves is opened or closed at certain points of time relative to theother valves during the glue application.
 35. The bottoming device inaccordance with claim 34 wherein a time period between the opening andthe closing of the valve is less than 5 milliseconds.
 36. A bottomingdevice that forms a cross bottom paper bag, the device configured toform the cross bottom of the bag by providing folds at extremities of atubular segment from which the bag is produced such that lines of a glueare applied to at least one of a folded bottom on the extremities of thetubular segment and a sheet to be glued with the bottom, and to connectand glue the folded bottom and the sheet, the bottoming devicecomprising a gluer having an application head including a plurality ofvalves each having at least one glue output orifice through which theglue is directly applied under pressure to the at least one of thefolded bottom and the sheet, the valves being arranged in aconfiguration that includes a plurality of valve rows (VRi to VRn) eachextending along a length of the application head in a direction (y) thatis transverse to a bag transfer direction (x), with each of the valverows including a plurality of valves (Vi to Vn) arranged along a lengthof the valve row, and a glue circulation channel that provides forcontinuous circulation of the glue within the application head, the gluecirculation channel including (i) a first transverse channel and asecond transverse channel each extending along the length of theapplication head in the (y) direction, and (ii) a connection channelextending across the application head in the (x) direction, theconnection channel connecting an end of the first transverse channel toan adjacent end of the second transverse channel, the glue circulationchannel providing for glue flow through the first transverse channel,across the connection channel, and through the second transverse channelto drain from the application head.
 37. The bottoming device inaccordance with claim 36 wherein each of the valves includes a pluralityof glue output orifices.
 38. The bottoming device in accordance withclaim 37 wherein each of the valve rows is offset laterally in the (y)direction from an adjacent valve row.
 39. The bottoming device inaccordance with claim 38 wherein each of the valves includes a group ofglue output orifices oriented in a line extending in the (y) directionand having an orifice group width (D), the orifice group being centeredwithin a breadth (B) of the valve.
 40. The bottoming device inaccordance with claim 39 wherein the offset (C) is equal to a lateraldistance between the centered orifice group in one of the valve rows andthe centered orifice group in an adjacent valve row.
 41. A bottomingdevice that forms a cross bottom paper bag, the device configured toform the cross bottom of the bag by providing folds at extremities of atubular segment from which the bag is produced such that lines of anadhesive are applied to at least one of a folded bottom on theextremities of the tubular segment and a sheet to be adhered with thebottom, and to connect and adhere the folded bottom and the sheet, thebottoming device comprising an adhesive application head including aplurality of valves each having a plurality of adhesive output orificesthrough which the adhesive is directly applied under ahigher-than-ambient pressure to the at least one of the folded bottomand the sheet in a contact-free manner, the valves being arranged in aconfiguration that includes a plurality of valve rows (VRi to VRn) eachextending along a length of the application head in a direction (y) thatis transverse to a bag transfer direction (x), with each of the valverows including a plurality of valves (Vi to Vn) arranged along a lengthof the valve row, and an adhesive circulation channel that provides forcontinuous circulation of the adhesive within the adhesive applicationhead, the adhesive circulation channel including (i) a first transversechannel and a second transverse channel each extending along the lengthof the application head in the (y) direction, and (ii) a connectionchannel extending across the application head in the (x) direction, theconnection channel connecting an end of the first transverse channel toan adjacent end of the second transverse channel, the adhesivecirculation channel providing for adhesive flow through the firsttransverse channel, across the connection channel, and through thesecond transverse channel to drain from the application head.